import java.util.HashMap;
import java.util.Scanner;
import java.util.Map.Entry;

public class Main2 {
    public static void main(String[] args) {
        try (Scanner scan = new Scanner(System.in)) {
            int N = scan.nextInt();
            HashMap<String, Integer> map = new HashMap<>();
            for(int i=0; i<N; i++) {
                String key = scan.next();
                Integer value = map.get(key);
                if(value == null) {
                    map.put(key, 1);
                } else {
                    map.replace(key, value+1);
                }                
            }
            
            int max = 0;
            for(Entry<String, Integer> e : map.entrySet()) {
                max = Math.max(max, e.getValue());
            }
            
            if((N+1)/2 >= max) {
                System.out.println("YES");
            } else {
                System.out.println("NO");
            }
        }
    }
}